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The enhancement of $\alpha$ elements such as oxygen is an important phase in the chemical evolution of the early Universe, with nebular material becoming enriched in these elements sooner than iron. Here we present models which incorporate…

Solar and Stellar Astrophysics · Physics 2022-04-08 C. M. Byrne , E. R. Stanway , J. J. Eldridge , L. McSwiney , O. T. Townsend

We compute and present the distribution in mass of single and binary neutron stars, strange stars, and black holes. The calculations were performed using a stellar population synthesis code. We follow evolution of massive single stars as…

Astrophysics · Physics 2007-05-23 Krzysztof Belczynski , Tomasz Bulik , Wlodzimierz Kluzniak

We compute and present the distribution in mass of single and binary neutron stars, strange stars, and black holes. The calculations were performed using a stellar population synthesis code. We follow all phases of single and binary…

Astrophysics · Physics 2009-10-31 Krzysztof Belczynski , Tomasz Bulik , Wlodzimierz Kluzniak

We performed a near-infrared (NIR, $\sim$1.0$\mu$m-2.4$\mu$m) stellar population study in a sample of early type galaxies. The synthesis was performed using five different evolutionary population synthesis libraries of models. Our main…

Rapidly growing catalogs of compact binary mergers from advanced gravitational-wave detectors allow us to explore the astrophysics of massive stellar binaries. Merger observations can constrain the uncertain parameters that describe the…

Solar and Stellar Astrophysics · Physics 2023-06-28 Jeff Riley , Ilya Mandel

The stellar populations of galaxies contain a wealth of detailed information. From the youngest, most massive stars, to almost invisible remnants, the history of star formation is encoded in the stars that make up a galaxy. Extracting some,…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Jarle Brinchmann

Using "Scenario Machine" we have carried out population synthesis of radio pulsar with black hole binaries (BH+Psr) in context of the most wide assumptions about star mass loss during evolution, binary stars mass ratio distribution, kick…

Astrophysics · Physics 2009-11-10 V. M. Lipunov , A. I. Bogomazov , M. K. Abubekerov

We present a comprehensive description of the population synthesis code StarTrack. The original code has been significantly modified and updated. Special emphasis is placed here on processes leading to the formation and further evolution of…

Astrophysics · Physics 2009-11-11 K. Belczynski , V. Kalogera , F. A. Rasio , R. E. Taam , A. Zezas , T. Bulik , T. J. Maccarone , N. Ivanova

BONNFIRES, a new generation of population synthesis code, can calculate nuclear reaction, various mixing processes and binary interaction in a timely fashion. We use this new population synthesis code to study the interplay between binary…

Solar and Stellar Astrophysics · Physics 2014-03-05 Herbert H. B. Lau , Robert G. Izzard , Fabian R. N. Schneider

Neutron star X-ray binaries (NS XRBs) associated with supernova remnants (SNRs) are the youngest X-ray binaries that can provide insights into the early evolution of X-ray binaries and the formation properties of neutron stars. There are an…

High Energy Astrophysical Phenomena · Physics 2021-10-27 Ze-pei Xing , Xiang-dong Li

Low mass star formation regions are unlikely to fully populate their initial mass functions, leading to a deficit of massive stars. In binary stellar populations, the full range of binary separations and mass ratios will also be…

Astrophysics of Galaxies · Physics 2023-05-03 E. R. Stanway , J. J. Eldridge

In three previous papers (Pelat 1997, 1998 and Moultaka & Pelat 2000), we set out an inverse stellar population synthesis method which uses a database of stellar spectra. Unlike other methods, this one provides a full knowledge of all…

Astrophysics · Physics 2009-11-10 J. Moultaka , C. Boisson , M. Joly , D. Pelat

The fraction of stars in binary systems within star clusters is important for their evolution, but what proportion of binaries form by dynamical processes after initial stellar accretion remains unknown. In previous work, we showed that…

Observations of exoplanets and protoplanetary disks show that binary stellar systems can host planets in stable orbits. Given the high binary fraction among stars, the contribution of binary systems to Galactic habitability should be…

Earth and Planetary Astrophysics · Physics 2020-11-18 Paolo Simonetti , Giovanni Vladilo , Laura Silva , Alessandro Sozzetti

We present a sample of synthetic massive stellar populations created using the Starburst99 evolutionary synthesis code and new sets of stellar evolutionary tracks, including one set that adopts a detailed treatment of rotation. Using the…

Solar and Stellar Astrophysics · Physics 2015-06-04 Emily M. Levesque , Claus Leitherer , Sylvia Ekstrom , Georges Meynet , Daniel Schaerer

In dense stellar systems the frequent dynamical interactions between stars play a crucial role in the formation and evolution of compact binaries. We study these processes using a novel approach combining a state-of-the-art binary…

Astrophysics · Physics 2007-05-23 N. Ivanova , F. A. Rasio

A population number synthesis code follows in detail the evolution of a population of single stars and of close binaries. We use our code to simulate the population of neutron star - neutron star and black hole - neutron star binaries. We…

Astrophysics · Physics 2007-05-23 E. De Donder , D. Vanbeveren

The COMPAS public rapid binary population synthesis code has undergone a number of key improvements since the original COMPAS methods paper (Team COMPAS: Riley et al., 2022) was published. These include more sophisticated and robust…

Modeling binary star populations is critical to linking the theories of star formation and stellar evolution with observations. In order to test these theories, we need accurate models of observable binary populations. The Kepler Eclipsing…

Solar and Stellar Astrophysics · Physics 2021-03-24 Mark Wells , Andrej Prša

Observations of star-forming galaxies in the distant Universe have confirmed the importance of massive stars in shaping galaxy emission and evolution. Distant stellar populations are unresolved, and the limited data available must be…

Astrophysics of Galaxies · Physics 2020-06-10 E R Stanway , J J Eldridge